Cube Audio Nenuphar Single Driver Speaker (10 inch) TQWT Enclosure

Tried Gallo TR1 sub (sealed 10 incher) in the setup. Took it out right away - granted, not the last word in high-end sub sophistication but in my mind all it did was muddy the low end. Much prefer the Cube's "naked" - plenty of bass foundation in my room. All the Gallo did was replicate home theatre type bass in place of the pure texture and tonality of the Cube 10 incher. As always, YMMV.

kw6 The KEF KC62 has "two 6.5 inch force cancelling drive units powered by 1,000W RMS of specially designed Class D amplification"--so not even 8 inch.

As to your questions about things I can hear, yes in spades to all but that was before the sub was added.  Of course the sub made the bass drum in a drum kit sound deeper and more three dimensional.  In fact, one of the surprising side effects of a well integrated sub, is, as abd1 mentioned, to add depth to the soundstage.  And I certainly hear that despite using only one sub.  Although I don't hear the muddiness that dspringham did, I thought about running the output signal through the crossover in the sub to eliminate the amp sending low frequency info to the speakers as strongly recommended by Srajan--which in theory would be cleaner, eliminating overlap.  But I'm pretty sure you have to have two subs to maintain the stereo effect to do that.  

@stephendunn  Are you still using the Townshend platforms / podiums under the Nenuphars? Thanks. - David.

@mga71   Congratulations on moving forward with your Audio Note 300B. Can't wait for your feedback on the pairing results!

@dspringham   Echoing Charles' response...+1 

I put one of these Zen amps on my Cube Audio Nenuphars and it sounds unearthly good.